How do short-day plants differ from long-day plants?
A.
B.
C.
D.
Correct. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Incorrect. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Activity 37.2 Quiz
Refer to the figure.
The figure summarizes two sets of conditions of light/dark over a 24 hour cycle. Two plants, a short-day plant and a long-day plant, are exposed to these same conditions. Based on what you learned from the simulation, what do you predict will be observed in the bottom set of conditions?
A.
B.
C.
D.
Correct. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Incorrect. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Activity 37.2 Quiz
Refer to the table.
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
X
+
0
0
++
+++
+++
+++
++
+
Y
+++
+++
++
+
0
0
+
++
+++
The table shows changes in the concentrations of two forms of phytochrome in a plant grown in a growth chamber under a 12-hour light and 12-hour dark cycle. The two forms of phytochrome are labeled X and Y. Which form of phytochrome is represented by X, which form is represented by Y, and are the data consistent with flowering or non-flowering behavior in this plant?
A.
B.
C.
D.
Correct. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Incorrect. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Activity 37.2 Quiz
What evidence given in this simulation supports the claim that night length, rather than day length, is the cue that triggers flowering?
A.
B.
C.
D.
Correct. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
Incorrect. See Key Concept 37.2 Hormones and Signaling Determine the Transition from the Vegetative to the Reproductive State
